"This was a despicable incident that has left an elderly man traumatised.
"Detectives are shocked at the level of unnecessary violence the victim endured in a sustained attack in his own home and we are appealing to the community to help us find the person responsible.
"We take these types of incidents extremely seriously and urge anyone who may have seen a man acting suspiciously in the area either around the time of the incident, or in the days prior to the offence, to call us so we can take action against the offender."
More top news
Everton Football Club are backing a campaign to help stop young people falling victim to online abuse and bullying
Shayne Ward is urging people to give up chocolate for March. He's doing it to help raise £1 million for the British Heart Foundation
Shayne Ward is urging the nation to join him and give up chocolate for March in support of the British Heart Foundation’s DECHOX campaign.